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undo

un·do / ˌənˈdoō/ • v. (-does / -ˈdəz/ ; past -did ; past part. -done ) [tr.] 1. unfasten, untie, or loosen (something): the knot was difficult to undo. 2. cancel or reverse the effects or results of (a previous action or measure): there wasn't any way Evelyn could undo the damage. ∎  cancel (the last one or more commands executed by a computer). 3. formal cause the downfall or ruin of: Iago's hatred of women undoes him. • n. Comput. a feature of a computer program that allows a user to cancel or reverse the last one or more commands executed.

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"undo." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

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"undo." The Oxford Pocket Dictionary of Current English. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/undo

undo

undo A feature of some applications that allows the user to reverse the effect of the last action or actions. This allows recovery from unintentional actions, and could prevent major damage resulting from a very simple but incorrect command. See also user-friendly, rollback.

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"undo." A Dictionary of Computing. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"undo." A Dictionary of Computing. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/undo

"undo." A Dictionary of Computing. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/undo

undo

undo
A. unfasten;

B. annul, make of no effect; bring to nought, destroy, ruin OE.;

C. † expound XIII. OE. undōn = (M)Du. ontdoen, OHG. intuon; see UN-2, DO1.
Hence undone ruined, destroyed XIV.

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"undo." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"undo." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/undo-0

"undo." The Concise Oxford Dictionary of English Etymology. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/undo-0